<?php
/**
 * Smarty plugin
 * @package Smarty
 * @subpackage plugins
 */

/**
 * Load requested plugins
 *
 * @param array $plugins
 */

// $plugins


function smarty_core_load_plugins($params, &$smarty) {
	
	foreach ( $params ['plugins'] as $_plugin_info ) {
		list ( $_type, $_name, $_tpl_file, $_tpl_line, $_delayed_loading ) = $_plugin_info;
		$_plugin = &$smarty->_plugins [$_type] [$_name];
		
		/*
         * We do not load plugin more than once for each instance of Smarty.
         * The following code checks for that. The plugin can also be
         * registered dynamically at runtime, in which case template file
         * and line number will be unknown, so we fill them in.
         *
         * The final element of the info array is a flag that indicates
         * whether the dynamically registered plugin function has been
         * checked for existence yet or not.
         */
		if (isset ( $_plugin )) {
			if (empty ( $_plugin [3] )) {
				if (! is_callable ( $_plugin [0] )) {
					$smarty->_trigger_fatal_error ( "[plugin] $_type '$_name' is not implemented", $_tpl_file, $_tpl_line, __FILE__, __LINE__ );
				} else {
					$_plugin [1] = $_tpl_file;
					$_plugin [2] = $_tpl_line;
					$_plugin [3] = true;
					if (! isset ( $_plugin [4] ))
						$_plugin [4] = true; /* cacheable */
				}
			}
			continue;
		} else if ($_type == 'insert') {
			/*
             * For backwards compatibility, we check for insert functions in
             * the symbol table before trying to load them as a plugin.
             */
			$_plugin_func = 'insert_' . $_name;
			if (function_exists ( $_plugin_func )) {
				$_plugin = array ($_plugin_func, $_tpl_file, $_tpl_line, true, false );
				continue;
			}
		}
		
		$_plugin_file = $smarty->_get_plugin_filepath ( $_type, $_name );
		
		if (! $_found = ($_plugin_file != false)) {
			$_message = "could not load plugin file '$_type.$_name.php'\n";
		}
		
		/*
         * If plugin file is found, it -must- provide the properly named
         * plugin function. In case it doesn't, simply output the error and
         * do not fall back on any other method.
         */
		if ($_found) {
			include_once $_plugin_file;
			
			$_plugin_func = 'smarty_' . $_type . '_' . $_name;
			if (! function_exists ( $_plugin_func )) {
				$smarty->_trigger_fatal_error ( "[plugin] function $_plugin_func() not found in $_plugin_file", $_tpl_file, $_tpl_line, __FILE__, __LINE__ );
				continue;
			}
		} /*
         * In case of insert plugins, their code may be loaded later via
         * 'script' attribute.
         */
else if ($_type == 'insert' && $_delayed_loading) {
			$_plugin_func = 'smarty_' . $_type . '_' . $_name;
			$_found = true;
		}
		
		/*
         * Plugin specific processing and error checking.
         */
		if (! $_found) {
			if ($_type == 'modifier') {
				/*
                 * In case modifier falls back on using PHP functions
                 * directly, we only allow those specified in the security
                 * context.
                 */
				if ($smarty->security && ! in_array ( $_name, $smarty->security_settings ['MODIFIER_FUNCS'] )) {
					$_message = "(secure mode) modifier '$_name' is not allowed";
				} else {
					if (! function_exists ( $_name )) {
						$_message = "modifier '$_name' is not implemented";
					} else {
						$_plugin_func = $_name;
						$_found = true;
					}
				}
			} else if ($_type == 'function') {
				/*
                 * This is a catch-all situation.
                 */
				$_message = "unknown tag - '$_name'";
			}
		}
		
		if ($_found) {
			$smarty->_plugins [$_type] [$_name] = array ($_plugin_func, $_tpl_file, $_tpl_line, true, true );
		} else {
			// output error
			$smarty->_trigger_fatal_error ( '[plugin] ' . $_message, $_tpl_file, $_tpl_line, __FILE__, __LINE__ );
		}
	}
}

/* vim: set expandtab: */

?>
